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Posted at 05:00 AM ET, 06/21/2011

Forecast: Maybe morning showers, then more heat

Today's Daily Digit
 
A somewhat subjective rating of the
day's weather, on a scale of 0 to 10.

 
Morning showers precede another burst of unpleasant heat and humidity levels.
 
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EXPRESS FORECAST

Today: Chance of AM showers. PM heat/humidity. 89-92. | Tonight: Cloudy, muggy, few evening storms. 67-72. | Tomorrow: Partly sunny, hot, isolated storms. 92-95. | Get Express Forecast by E-mail

FORECAST IN DETAIL

Once any showers pass this morning, the heat builds back. But it should not rival the record-breaking scorcher of two weeks ago. It is a shorter peak heat event (tomorrow is the hottest) combined with increased chances of showers, storms, and clouds. Still, heat indices surge to around 100 tomorrow and humidity hangs on probably right into the weekend.


Radar & lightning: Latest D.C. area radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Tuesday): A warm front lifting north through the region this morning is delivering a decent (50-60 percent) chance of showers, with odds increasing north of the District. There could be some rumbles of thunder too. Skies should become partly sunny this afternoon, but temperatures will build on top of the already hefty humidity to push us toward the upper 80s to low 90s. We still run a 30% risk of p.m. thunderstorms (isolated severe possible). Light winds mostly from the south. Confidence: Medium

Thundercast:

Probability: 30%
Coverage: Widely scattered
Most likely timing: 4-8 p.m.

Tonight: Muggy and partly cloudy with isolated evening thunderstorms (30% again). Lows in the upper 60s to more likely low 70s in town. Light winds. Confidence: Medium-high

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday): Partly sunny, very hot, and humid with highs up into the middle 90s, heat indices up around 100 or even hotter, and a 30% chance again of afternoon/evening thunderstorms (some could be severe with gusty winds and hail). This is the hottest day of the week, so if you can get through it, we should see gradual improvement toward the weekend. Winds from the south and southwest at 10-15 mph. Confidence: Medium-High

Tomorrow night: Partly to mostly cloudy, muggy, and continued roaming thunderstorms (30% chance of you getting one). Lows in the upper 60s to low 70s (downtown). Confidence: Medium

A LOOK AHEAD

Thursday is the day that the cold front eases through the area and it should set off more thunderstorms (40% chance), but we won’t be able to shake the heat and humidity that easily. Partly sunny skies with highs probably in the low 90s in most spots. Partly cloudy and still more muggy yet Thursday night with lows in the upper 60s to low 70s. Confidence: Medium

Friday sees some incremental improvement with partly sunny skies upper 80s to low 90s, still a 30% chance of thunderstorms in the afternoon. But humidity levels should be slightly lower than much of this week. Some clouds Friday night with lows in the upper 60s to around 70. Confidence: Low-medium

The last weekend of June is not as annoyingly hot, but we’re not completely shaking that humidity. Highs in the mid-to-upper 80s look more likely with lows in the mid-60s to around 70. We still run the risk of afternoon/evening showers and storms, especially on Saturday. Sunday is our best chance of the whole period for a mostly dry day. Confidence: Low-medium

By  |  05:00 AM ET, 06/21/2011

Categories:  Forecasts

 
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